Ringo- you can buy 400 and 800 point lumps from Xbox.com.

I've never personally cared about the lumps that points are sold in as I usually keep a stack of points on my account. So I've never had to buy 500 so that I could spend 400. Though- it's not like the remaining 100 expire or anything... Next time you needed 400, and you bought another 500... You'd have 200 left over, right? Eventually it would work itself out. Maybe people are worried about loaning MS a couple bucks until they spend it?

I do wish I could gift some points to the sims. And by sims, I mean my wife, kids, or friends. My family can play whatever I buy for the xbox on my account, but my son has recently taken to football and he wanted to get a football for his avatar. It was 80 points, which equates to about 50 cents from the points in my account. It seems worth it, to me, to encourage his interest in the sport... But I don't want to unload $5 on 400 points just to spend 80 of them. Who knows how long it would take to spend all 400 points on his account, if ever. It'd be nice if I could 'paypal' him the 80 points or just gift him the football.